Path: csiph.com!xmission!news.snarked.org!news.linkpendium.com!news.linkpendium.com!panix!usenet.stanford.edu!not-for-mail From: hk Newsgroups: gnu.bash.bug Subject: Incorrect example for `[[` command. Date: Fri, 20 Sep 2019 13:40:00 +0800 Lines: 27 Approved: bug-bash@gnu.org Message-ID: References: NNTP-Posting-Host: lists.gnu.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Trace: usenet.stanford.edu 1568982278 18229 209.51.188.17 (20 Sep 2019 12:24:38 GMT) X-Complaints-To: action@cs.stanford.edu To: bug-bash@gnu.org Envelope-to: bug-bash@gnu.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=tvWP+Cs7dUFZmTSWpTNfmNDwD/l0LcAEfdVlBR9zTWw=; b=p9L3mB9ANiHTYg4597MbTfAwZnKvmMKUXc49Bjell73AQoGwb9yYdG5fNjj+yYb/w9 wwumR6ql+4DCyPuedpo3j3vfpEuzPwFgkMm33/ypwQbcPmq0iw5cfvPKOu5q+3rBdQbB 8kSiZ4kmeHz8aOHqvCEc2CNTj8VyIFqi+4BrVj3P3N9OsTU6vcMmy75Mm2vsH68qBTv3 bXeXjL87wS5/ZXALMPOGFNETBzyOJTOsvUd5wZ5MUd7BykS1pIxRQmnRkJ+BnQOESOEp p3p1EAUJf4QCkn4DUPlQqosihd3/lRPHgE2C5K1MM9DmxcnL1ZPi2gt+WmKcCiUREAXQ 7dKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=tvWP+Cs7dUFZmTSWpTNfmNDwD/l0LcAEfdVlBR9zTWw=; b=HRJVEHQHiT6D/K2Z0jHX984lKqhO+nWUG4WjWnAdQo8/RuMMW81nkOCiaZvec7okBZ 6yY/W3j/i3iIhnyn7DtFMWRZEpHAWj+NJCuRlsP2zgUjyKICRggKHrX95s7NdbGazXob DW7kLWRnWGgZZhTdwFdBVsiUYZYj/JjuV2o7i3ll5iqEJyxvsG2QvtAnIuZaJrrZ1DP7 bprDg5eXG8gT5kc0AYHFom0+1uqBZ1UtA4LciBf83bAfU3tNwQc8r6u9WH4CQKGs4YIR 8io52ZeCAzFYAuSaP3UCMfTFgP1dFyPKLmtToVIkqECHEm3hjwmUONkDqw0YJMd+YiUc 8RBA== X-Gm-Message-State: APjAAAXbhxW7eFGiVM3ErS9AWDFUXzYC+HHPQASvQAIeChazIXoVmHd1 3J0xlgq/3u0mzl3tgrVHi8gIfp0p5KCr56s1Jq64Ji+0 X-Google-Smtp-Source: APXvYqyi/xgbvdqHlVEdR4jOLrPaDCsr1ouRQEsoXbcbp6Xjm2NRupSraSU4sidDjZ7JNaUwWx+IEJhLqZOkzT4BwEI= X-Received: by 2002:a37:a4d:: with SMTP id 74mr1940296qkk.90.1568958011100; Thu, 19 Sep 2019 22:40:11 -0700 (PDT) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::742 X-Mailman-Approved-At: Fri, 20 Sep 2019 08:24:34 -0400 X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: bug-bash@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Bug reports for the GNU Bourne Again SHell List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Mailman-Original-Message-ID: Xref: csiph.com gnu.bash.bug:15380 Configuration Information [Automatically generated, do not change]: Machine: x86_64 OS: linux-gnu Compiler: gcc Compilation CFLAGS: -g -O2 -Wno-parentheses -Wno-format-security uname output: Linux hk 4.15.0-62-generic #69-Ubuntu SMP Wed Sep 4 20:55:53 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux Machine Type: x86_64-pc-linux-gnu Bash Version: 5.0 Patch Level: 0 Release Status: release Description: On section 3.2.4.2 of Bash Reference Manual, the example on* [[...]]* (page 13 in the PDF) is incorrect. Specifically, the example say *[[ $line =~ [[:space:]]*?(a)b ]]* will match values like *'aab'* and* 'aaaaaab*'. But it won't. The operator is* =~*, but the operand on the right side is a pattern while it should be a regular expression. Repeat-By: [Describe the sequence of events that causes the problem to occur.] Fix: [Description of how to fix the problem. If you don't know a fix for the problem, don't include this section.]